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Abstract The dianionic ligand TIPSDAX (2,7-di-tert-butyl-9,9-dimethyl-N4,N5-bis(triisopropylsilyl)-4,5-diamido-9H-xanthene) was synthesized and employed to support low-valent first-row transition metal complexes featuring iron(II) and cobalt(II). These neutral complexes were studied structurally and electrochemically. Cyclic… Click to show full abstract
Abstract The dianionic ligand TIPSDAX (2,7-di-tert-butyl-9,9-dimethyl-N4,N5-bis(triisopropylsilyl)-4,5-diamido-9H-xanthene) was synthesized and employed to support low-valent first-row transition metal complexes featuring iron(II) and cobalt(II). These neutral complexes were studied structurally and electrochemically. Cyclic voltammetry revealed a variety of oxidation features in the ligand and both metal complexes, while only the Co(II)(TIPSDAX)(THF) complex exhibited a reduction event. The cobalt(II) complex was chemically reduced to afford an isolable anionic Co(I) complex whose solid-state structure revealed a considerably more linear geometry at the metal center.
Journal Title: Polyhedron
Year Published: 2020
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